Improvement in machines for making bolts, rivets



2 Sheets-Sheet 1.

J. A. LeBLANC & A. J'. VINCENT. MACHINES FUR MAKING BOLTS; RIVETS, &c. No.181,453. l iatented Aug. 22,1v876.

Mbzeases.

N. PETERS, PNOTO UTHOGRAFHER, WASHINGTON, D C. I

J. A. LeBLANC & A. J. VINCENT.

MACHINES FOR MAKING BOLTS, RIVETS, 8.0.

2 Sheets-Sheet 2.

Patented Aug.22,1876..

t NI'IED STATES, PATENT OFFICE.

JULES A. LE BLANO AND AUGUSTE J. VINCENT, OF PARIS, FRANCE,

ASSIGNORS TO GEORGE GREENWOOD, OF LEEDS, ENGLAND. 1

IMPROVEMENT IN MACHINES FOR MAKING BOLTS, RIVETS, 8co- S ecification forming part of Letters Patent No. 181,453, dated August 22, 1376; application filed,

- J line 9, 18 76. v

To all whom it may concern:

Be it known that we, JULES ARMAND LE BLANO and AUeUs'rE JEAN VINCENT, both of Paris, France, mechanical engineers, have invented certain Improvements in Machinery for the Manufacture of Rivets, Bolts, and other metallic articles produced by stamping, of

which the following is a specification:

This invention. relates to a novel arrangement of screw-press, which is intended to supersede the use of the well-known fly-press in stamping or shaping metals.

Figure 1 shows the machine in front elevation, and Fig. 2 in central vertical section, as fitted with dies suitable for forming the heads of bolts; but these dies may be-readily replaced by stampin g-dies of other shapes suited to the work required to be performed.

A is a cast-iron framing, fitted with vertical guides B, between which works a sliding frame, 0. (Shown detached at Fig. 3.) This framing has two cross-pieces, c c, the former of which carries the lower die a, which, with the frame 0, has a vertical reciprocating motion, while the upper cross-piece 0' is threaded to receive the screw D for moving the frame 0 in its guides, which screw depends from the cross-head A of the framing A, it, being provided with a collar or shoulder for that purpose. The lower end of the screw D rests in a foot-step carried by a cross-piece, A, of the main framing, and it is in this cross-piece that the stationary heading-die a is fixed.

For the purpose of centering the reciprocating die a, it is fitted into a circular dieholder, as shown in the enlarged sectional view, Fig.4. On the perimeter of this dieholder inclined radial slots are formed to receive wedge-blocks, which fit into the crosspiece 0. Through these wedge-blocks are passed screw-bolts, the lower ends of which receive nuts, that enter slots formed in the cross-piece 0. By tightening up these bolts the die-holder will be held firmly in place, and at the same time adjusted laterally,the amount of adjustment being determined by the action of the wedges upon the die-holder. Attached to the under side of the cross-piece c are tubular pieces d d which serve to carry a loose plunger, (1 which may be adjustable, and the upper end of which enters the die a, and serves to close it at the bottom. The tube (1 is threaded to receive the tubular piece d, which has an opening at bottom for the purpose to be presently explained, and is furnished with handles for turning it to adjust the elevation of the plunger (P, which rests upon the bot:

. tom of the tube (1 Immediately below this loose plunger is a fixed pin, 0, which stands up from the bed of the press, and is supported in its position by asteel cross-pin, c. This vertical pin 0 is intended to enter the adjustable tube d as the frame 0 descends, and, by

intercepting the downward motion of the loose plunger 01 to thrust out the headed bolt from the movable die. The pin 6 serves also to carry elastic india-rubber washers f j", which will receive the blow of the descending frame 0. Should, however, this frame come down with undue force, the pressure on the elastic washers will be received by the pin 0, and in the event of this force being sufficientto strain the press, the ends of cross-pin e, which supports the pin 6, will be cut off, and thus prevent any damage occurring to the machinery.

The screw D; which gives the traversing motion to the slide 0, carrying the die a, has keyed to its upper end a beveled frictionwheel, E. This wheel E is driven alternately in opposite directions by means of bevel friction-wheels F and G, keyed to the same horizontal shaft H.- The shaft H turns in. bearings in the upper end of the frame A, and is free to receive a slight endwise motion in its bearings, to bring either of the wheels F or G into action, as desired. Keyed to the shaft H, midway between the wheels F and Gr, is a band-pulley, I, for communicating, through a belt,from any prime mover, rotary motion to the friction-Wheels. The lateral shifting of these wheels into and out of position is efi'ected by means of counterweighted levers, which bear upon the opposite ends of the shaft H.

K is a crank-lever, jointed to a bracket on the main framing A, and weighted by a rod,

K, pendent from its longer arm. The shorter arm of this crank-lever bears against the end of the shaft H, and has a tendency to thrust the wheel G into contact with the frictionwheel E. A counteracting force is, however,

applied to the opposite end of the shaft H by means of a pressing-piece, L, which isarranged in line with the shaft, and is connected, by two short links, to rock-shafts mounted on a bracket of the main framing. Keyed to one of these rock-shafts is a weighted arm, L, which serves to hold back the pressing-piece L from the shaft H; and keyed to the end of the other rock-shaft is an arm, L to the free end of which is jointed a pendent rod, L for giving the pressing-piece an opposite tendency. This pendent rod L slides in a guide projecting from the main framing A, and it is provided with two stops, L l, which may be adjustable, and also a handle, 1 Between these stops is an arm, P, which projects from the sliding frame (J, and embraces the rod L but so as to allow free play between them.

The action of the mechanism will be as follows: Supposing the lower die 60 to be in the position shown in the drawings, the attendant places a heated bolt-blank therein, and then, by pressing on the handle t draws down the lever L and through the pressing-piece L moves the shaft H endwise, and presses the friction-wheel F into contact with the wheel E. Rotary motion being communicated to the shaft H in the direction of the arrow, Fig. 2, the wheel E, with its screw D, will be rotated in a direction that will raise the sliding frame 0 rapidly and bring ,the bolt-blank into contact with the fixed heading-die (1/. So soon as this takes place the arm i will (supposing the stop 1 to have been properly adjusted) strike against that stop, lift the lever L and throw back the pressing-piece L clear of the shaft H. The effect of this will be to allow the weighted rock-lever K to act and throw the wheel G into frictional contact with the wheel E. The direction of rotation of the wheel E will thus be reversed, and the sliding frame 0 will be forced down to its former position. ()n the completion of the downward traverseot' the sliding frame the now headed bolt will be thrown up or out of the die by means of the sliding plunger d, before described, being brought into contact with the fixed pin a, standing up from the bed of the press.

G out of action. The machine will then be ready to receive and act upon a second boltblank, which, by a repetition of the movements above described, will, in like manner 1 to the first bolt-blank, be headed and thrust out of its die by the workman pressing upon the handle l Having now described the nature of our invention, and explained themanner of carryi ing the same into elfect, we wish it to be understood that we claim- 1. The sliding frame 0, carrying a die, a, andreceiving reciprocating motion toward and from the fixed die by means of a screw carrying a friction-wheel, which is driven alternately in opposite directions by frictionwheels on a sliding rotary shaft, which is 1 moved endwise by levers operated by a tappet worked by the sliding frame 0, all as set forth.

2. In combination with the sliding frame 0, carrying the die a, a plunger, al and a fixed pin, 0, for discharging the forged article from t JULES ARMAND LE BLANG. MARIE JNE. VINCENT.

Witnesses:

J. DURTEME,

26 Rue Lam's le Grand, Paris. BO ITARD,

17 at Rue du Temple, Paris.

Simultaneously with this action the 1 arm l will strike upon the stop L and draw down the lever L thereby throwing the wheel 

